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dc.contributor.authorLIMA, E. S.
dc.contributor.authorPINTO, A. C. S.
dc.contributor.authorNOGUEIRA, K. L.
dc.contributor.authorSILVA, L. F. R. e
dc.contributor.authorALMEIDA, P. D. O. de
dc.contributor.authorVASCONCELLOS, M. C. de
dc.contributor.authorCHAVES, F. C. M.
dc.contributor.authorTADEI, W. P.
dc.contributor.authorPOHLIT, A. M.
dc.date.accessioned2018-01-29T23:36:14Z-
dc.date.available2018-01-29T23:36:14Z-
dc.date.created2013-04-04
dc.date.issued2013
dc.identifier.citationMolecules, v. 18, n. 1, p. 178-189, jan. 2013.
dc.identifier.issn1420-3049
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/954997-
dc.description4-nerolidylcatechol (4-NC) is an unstable natural product that exhibits important antioxidant, anti-inflammatory and other properties. It is readily obtainable on a multi-gram scale through straightforward solvent extraction of the roots of cultivated Piper peltatum or P. umbellatum, followed by column chromatography on the resulting extract. Semi-synthetic derivatives of 4-NC with one or two substituent groups (methyl, acetyl, benzyl, benzoyl) on the O atoms have been introduced that have increased stability compared to 4-NC and significant in vitro inhibitory activity against the human malaria parasite Plasmodium falciparum. Antioxidant and anti-inflammatory properties may be important for the antiplasmodial mode of action of 4-NC derivatives. Thus, we decided to investigate the antioxidant properties, cytotoxicity and stability of 4-NC derivatives as a means to explore the potential utility of these compounds. 4-NC showed high antioxidant activity in the DPPH and ABTS assays and in 3T3-L1 cells (mouse embryonic fibroblast), however 4-NC was more cytotoxic (IC50 = 31.4 µM) and more unstable than its derivatives and lost more than 80% of its antioxidant activity upon storage in solution at −20 °C for 30 days. DMSO solutions of mono-O-substituted derivatives of 4-NC exhibited antioxidant activity and radical scavenging activity in the DPPH and ABTS assays that was comparable to that of BHA and BHT. In the cell-based antioxidant model, most DMSO solutions of derivatives of 4-NC were less active on day 1 than 4-NC, quercetin and BHA and more active antioxidants than BHT. After storage for 30 days at −20 °C, DMSO solutions of most of the derivatives of 4-NC were more stable and exhibited more antioxidant activity than 4-NC, quercetin and BHA and exhibited comparable antioxidant activity to BHT. These findings point to the potential of derivatives of 4-NC as antioxidant compounds.
dc.language.isoengeng
dc.rightsopenAccesseng
dc.subjectPiper peltatum
dc.subjectAntioxidantes
dc.titleStability and Antioxidant Activity of Semi-synthetic Derivatives of 4-Nerolidylcatechol.
dc.typeArtigo de periódico
dc.date.updated2018-01-29T23:36:14Zpt_BR
riaa.ainfo.id954997
riaa.ainfo.lastupdate2018-01-29
dc.identifier.doi10.3390/molecules18010178
dc.contributor.institutionEmerson Silva Lima, UFAM; Ana Cristina Silva Pinto, INPA; Karla Lagos Nogueira, INPA; Luiz Francisco Rocha e Silva, INPA; Patricia Danielle Oliveira de Almeida, UFAM; Marne Carvalho de Vasconcellos, UFAM; FRANCISCO CELIO MAIA CHAVES, CPAA; Wanderli Pedro Tadei, INPA; Adrian Martin Pohlit, INPA.
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